X-ray discovery of a dwarf-galaxy galaxy collision
Cosmology and Nongalactic Astrophysics
2015-06-16 v1
Abstract
We report the discovery of a probable dwarf galaxy colliding with NGC 1232. This collision is visible only in the X-ray spectral band, and it is creating a region of shocked gas with a temperature of 5.8 MK covering an impact area 7.25 kpc in diameter. The X-ray luminosity is 3.7 x1038ergs s-1. The long lifetime of this gas against radiative and adiabatic cooling should permit the use of the luminous afterglow from such collisions to be used as a way of estimating their importance in galaxy evolution.
Keywords
Cite
@article{arxiv.1308.0728,
title = {X-ray discovery of a dwarf-galaxy galaxy collision},
author = {Gordon P. Garmire},
journal= {arXiv preprint arXiv:1308.0728},
year = {2015}
}
Comments
5 Pages, Published in ApJ 770, 17, 2013